textproduct: Quad Cities

KEY MESSAGES

- Slightly above normal temperatures for mid July are forecast through the period with gradually warming of high temperatures into the lower to mid 90s by Wednesday/Thursday of next week. Limited humidity with dewpoints in the 60s to lower 70s will keep heat indices below 100 through the period.

- The forecast is large dry through the period with low chances of precipitation late next week.

LONG TERM /MONDAY THROUGH FRIDAY/

Issued at 136 PM CDT Sat Jul 11 2026

Both Monday and Tuesday will feature sunshine and highs rising to the upper 80s to lower 90s, with dew points in the upper 60s to lower 70s. This short term weather will linger well into the extended, as both deterministic and Ensembles are in good agreement in building ridging at the surface and aloft across the Plains Sunday night through midweek. A closed low in the Ohio and Tennessee Valleys and a closed 500 MB 600 DM contour in the northern Plains form a Rex Block across the central US through the middle of next week. The position of the high through Wednesday would keep dewpoints in the 60s through midweek. Temperatures will gradually modify through the week with high temperatures in the upper 80s to lower 90s and low temperatures warming from the mid 60s to the lower 70s after Wednesday. Dewpoints in the 60s/low 70s will limit heat indices to the mid to upper 90s next week.

Beyond Wednesday, models begin to disagree as the GFS shifts the high pressure to the east of the area while other models and the GFS Ensemble Mean retrograde the Rex Block to the west. This is bringing low chances of showers to the area Thursday and Friday for different reasons. The operational GFS solution allows for a storm system to approach the area from the west while the retrograde of the Rex Block brings the storm track closer to the area allowing a shortwave digging into the eastern Great Lakes to bring a cold front into the area and produce light chances of showers ands storms. The retrograding Rex Block solution appears to be favored by models and the NBM and think that this is the more likely scenario given the tendencies for blocking to retrograde with time.

AVIATION /18Z TAFS THROUGH 18Z SUNDAY/

Issued at 1220 PM CDT Sat Jul 11 2026

Northeast winds will continue through sunset around 5 to 12 kts, but will decrease towards evening. High pressure will keep winds light and variable from tonight through early next week, with generally VFR conditions. Good visibility will be in place due to seasonally dry air at low levels.

DVN WATCHES/WARNINGS/ADVISORIES

IA...None. IL...None. MO...None.